Twemoji graphics by Twitter, Inc. and other contributors.
Source: https://github.com/jdecked/twemoji
Pinned source commit: b6b55fef1e8636b540a6d016a4729ca8cdf2e60b
License: Creative Commons Attribution 4.0 International (CC BY 4.0)
https://creativecommons.org/licenses/by/4.0/
Graphics are unmodified. They are displayed as animated cutouts by the existing Pribbly physics engine.
These are standard Unicode emoji, not WhatsApp-owned artwork.